Cisco Industrial Ethernet 3000 Series Switches contain a vulnerability that could allow an unauthenticated, remote attacker to gain unauthorized access. Workarounds are available.
Cisco Industrial Ethernet 3000 Series Switches running certain Cisco IOS Software releases contain a vulnerability that could allow an unauthenticated, remote attacker to gain unauthorized access.
The vulnerability exists because insecure default Simple Network Management Protocol (SNMP) community names are hard coded into the affected software. An unauthenticated, remote attacker could exploit this vulnerability to gain unauthorized access to a targeted device and potentially gain complete control over the device.
Cisco confirmed this vulnerability in a security alert and released workarounds.
Cisco IOS Software releases 12.2(52)SE, 12.2(52)SE1, 12.2(53)SE, and 12.2(53)SE1 are vulnerable when running on Cisco Industrial Ethernet 3000 Series Switches.
To exploit this vulnerability, an attacker must be able to send SNMP requests to a targeted device. The attacker would likely require access to internal networks to send SNMP requests, increasing the difficulty of an exploit. If successful, the attacker could completely compromise a targeted device.
Cisco IOS Software releases prior to 12.2(52)SE do not contain the vulnerability. Updated software is not yet available, but should be released by August.
An unauthenticated, remote attacker could exploit this vulnerability to gain unauthorized access to a targeted device, possibly allowing the attacker to gain complete control over a vulnerable system.
The vulnerability exists because insecure default SNMP community names are hard coded into the affected software. The default SNMP community names allow read and write access. Although an administrator can remove the names, they are restored when the device restarts.
An unauthenticated, remote attacker who knows the default credentials could gain unauthorized access to a targeted device. The attacker could use this access to take complete control over the device.
Administrators are advised to apply updates as they become available.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.
Administrators are advised to create an Embedded Event Manager (EMM) policy on an affected device to remove the default SNMP community names each time the device starts.
Administrators are advised to monitor critical systems.
The security vulnerability applies to the following combinations of products.
The urgency and severity ratings of this alert are not tailored to individual users; users may value alerts differently based upon their network configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.